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sorry, it had been a long day. the 100 psig was after i bypassed the fan cycle control so the unit would run. the 500/250 was what i was getting, but since the fan cycle control cut in was too high, the system couldn't run. i don't even know what the cut in is, couldn't read it.

if it were air, could i pump down the system, and check the pressure against my PT chart? i realize that the LL Schraeder Valve would be blocked by the LL Service valve (when closed), but there is a schraeder on the discharge manifold. what do ya'll think?

if it were air, could i pump down the system, and check the pressure against my PT chart? i realize that the LL Schraeder Valve would be blocked by the LL Service valve (when closed), but there is a schraeder on the discharge manifold. what do ya'll think?

sell them a new unit, tell the customer tranes are junk, parts are expensive and the problem could be electrical,mechanical or both combined. that approach has never fail me, trust on this one.

Is there anything between the discharge and LLSV that could cause a restriction? Filter/Drier perhaps?
To remove air I was taught to recover the refrigerant into a clean tank and let it sit for a while. Then bleed the air out of the gas valve. This way you could weigh out the charge to verify charge, remove any non-condensable gases, and weigh the correct charge in to eliminate the charge as a possible problem.

"The bitterness of poor quality remains long after the sweetness of low price is forgotten". --Benjamin Franklin
"Don't argue with an idiot, they will drag you down to their level and beat you with experience". --Mark Twainhttp://www.campbellmechanical.com

the thing is, i was hoping to save time by pumping all the refrigerant into the condenser and essentially do the same thing... there is a cheap copper FD that was in the unit, then another filter drier out of the unit... though no temp drop on the internal FD.

the thing is, i was hoping to save time by pumping all the refrigerant into the condenser and essentially do the same thing... there is a cheap copper FD that was in the unit, then another filter drier out of the unit... though no temp drop on the internal FD.

You could still have a substantial pressure drop across the FD without a noticeable temperature drop. There was a thread about this very issue recently.

"The bitterness of poor quality remains long after the sweetness of low price is forgotten". --Benjamin Franklin
"Don't argue with an idiot, they will drag you down to their level and beat you with experience". --Mark Twainhttp://www.campbellmechanical.com